Fix PowerShell Proxy Authentication Failed Errors - Windows Security Full Scan Stuck at 99% – How to Fix-Enable Auto-Start for Apps via Task Scheduler

Updated 2026-06-14 01:49:01developer-tools
Fix PowerShell Proxy Authentication Failed Errors - Windows Security Full Scan Stuck at 99% – How to Fix-Enable Auto-Start for Apps via Task Scheduler
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.